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Math Help - chain rule?

  1. #1
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    chain rule?

    Find the derivative of
    f(x)=e^4x(x^2+3x)
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  2. #2
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    f(x) = e^{4x}(x^2 + 3x)

    f'(x) = e^{4x}(2x + 3) + 4e^{4x}(x^2 + 3x)

    f'(x) = e^{4x}[(2x+3) + 4(x^2 + 3x)]

    I'll leave you to clean up the algebra from here.
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  3. #3
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    whoa. how did you do that?
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  4. #4
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    product rule + chain rule with the exponential function
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  5. #5
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    oh ok. thanks!
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